Creature Quizzes Online & Trivia

1. duck-the canvasback (aythya valisineria), historically known in the united states as a sheldrake, is a large diving duck, 4860 cm long and weighing 1270 g.the adult male has a black bill, a red head and neck, a black breast, red eyes and a whitish body. the adult female has a brown head and body and a black bill.their breeding habitat is north american prairie wetlands. the bulky nest is built from vegetation in a marsh and lined with down. loss of nesting habitat has caused populations to decline. canvasbacks usually take new mates each year, pairing in late winter.canvasbacks are strongly migratory and overwinter on the coasts of the united states, the great lakes and british columbia in saltwater bays, estuaries or lakes. this species is a very rare vagrant to western europe.

And it is believed to have been-first, try to find the error(s), if any, in the original sentence. we cannot use just the phrase believed to be, for it seems to refer to wingspan (and, grammatically, it does) rather than to quetzalcoatlus, which is the flying creature mentioned in the sentence. to correct the mistake, we need to put after the second comma the coordinating conjunction and and use the personal pronoun it to refer back to the antecedent, quetzalcoatlus, the original subject. the pronoun it is needed because of the presence of the second comma, which is not underlined and therefore not replaceable. the relative pronoun that is inappropriate when placed after the second comma as it cannot replace quetzalcoatlus. doing so would be grammatically incorrect. finally, if the relative pronoun which is placed just after the second comma, it can refer only to wingspan or, perhaps, to feet without any confusion. so, choice d and choice e are incorrect for yet another reason. from the above discussion, every choice can be eliminated except choice c, the correct answer. note: the past infinitive to have been is needed instead of the present infinitive to be because the quetzalcoatlus has died out.